Category: Teaching equipment

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Accelerometers and Great America: Here’s your ‘permission slip’

Last year, after more than a decade of bringing students (and their accelerometers) to Great America, Phillip Becker of Saint Helena High School was shocked to be informed by park staff that students would not be allowed to bring their accelerometers on the rides. Disappointment ruled the day, but his students made the best of it. Upon returning to school, Mr. Becker typed out a to-the-point letter to Cedar Fair Entertainment Company (the parent company for Great America), expressing his outrage at this change in policy. Shortly thereafter, Cedar Fair Entertainment replied, with a letter notifying him that there had been no change in policy, and apologizing for the mistake by the local park staff/management.

If you are planning on attending a Physics/Math day at Great America, you may want to print out a copy of the letter from Cedar Fair and carry it with you to the park, just in case this year’s staff/management makes a similar mistake.

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Physics of Baseball

David KaganDavid Kagan, CSU Chico

All of David’s material related to the Physics of Baseball are available on his website: Phys.csuchico.edu/baseball

David demonstrated the Physics of the Baseball bat including the progression of the baseball bat. He explained how to find the center of percussion of the baseball bat as well as the center of vibration.  The “sweet spot” of a bat is where the center of percussion and the center of vibration meet which means that the player will minimize the jarring force of the bat. David showed us many high speed videos from the playoffs that show the compression of a baseball bat being hit and the reaction of the bat after the impact. David demonstrated his rubber bat that has no internal support so that it can create a standing wave. By putting together that information, your students can choose the correction direction that the bat will swing and even guess where the baseball will break if it is outside or inside of the sweet spot.

Pablo showing off his collector baseballsPaul (Pablo) Robinson, San Mateo High School, retired

Pablo shared the physics of the splash hits in the San Francisco Giants Stadium. The ballpark has been designed for maximum home runs and the majority are hit to right field, where the ballpark meets the bay. He discussed the geometry of the park and where a home run is most likely hit.

He has more materials on the change in velocity of a ball hit on different planets, the Physics of a home run, etc. Visit his website for additional materials and videos.

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Fall 2012 Conference Share ‘n Tell

Tom at Share n TellTom Woosnam, Crystal Springs

Tom showed us a conducting experiment (picture to come) with two cans and a two copper wires that do not touch and attach to a coup of water. After the cup of water is filled a small neon bulb that that is connected to one of the two copper wires can discharge repeatedly. Tom’s best guess as to why it flashes is that one of the metal cans becomes randomly charged, say negatively, and that negative charge travels up the conducting materials to the water and repels electrons through the other wire to the other side that builds up potential.

 

Dan Burns, Los Gatos High School

Continue reading “Fall 2012 Conference Share ‘n Tell”

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Physics Equipment Donation at Sacramento State

Sac State logoFrom Hossein Partovi at Sacramento State:

We have put aside a large collection of lab equipment (scopes, meters, supplies, light sources, PAACO interfacing devices, …) to give away to schools and colleges on Saturday, October 16, 2010 (in Room 138, Sequoia Building, i.e., first floor of the science building), 9-12 AM. You can preview them on Friday, October 8, 2010, 1-3 PM.

If interested, please

  1. Print the attached acceptance letter (a “WORD” document) on your official letterhead, have it signed by your school or college official, and bring it with you on October 16th, and
  2. RSVP both October 8th and 16th events to let us know that you are coming by responding to physicschair@csus.edu.